Error in starting the project in laravel

[bearsdada]

D:\www\php\crm>php artisan serve

WARN Unable to respect the PHP_CLI_SERVER_WORKERS environment variable without the --no-reload flag. Only creating a single server.

Failed to listen on 127.0.0.1:8000 (reason: ?)
Failed to listen on 127.0.0.1:8001 (reason: ?)
Failed to listen on 127.0.0.1:8002 (reason: ?)
Failed to listen on 127.0.0.1:8003 (reason: ?)
Failed to listen on 127.0.0.1:8004 (reason: ?)
Failed to listen on 127.0.0.1:8005 (reason: ?)
Failed to listen on 127.0.0.1:8006 (reason: ?)
Failed to listen on 127.0.0.1:8007 (reason: ?)
Failed to listen on 127.0.0.1:8008 (reason: ?)
Failed to listen on 127.0.0.1:8009 (reason: ?)
Failed to listen on 127.0.0.1:8010 (reason: ?)

D:\www\php\crm>